Corrosion and hydrogen evolution rate control for X-65 carbon steel based on chitosan polymeric ionic liquids: experimental and quantum chemical studies
| Autor: | E. A. Khamis, H. Ashour, Shymaa M. El-Saeed, El Sayed H. El Tamany, H. A. El Nagy, E. G. Zaki |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbon steel General Chemical Engineering 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Corrosion Dielectric spectroscopy Metal chemistry.chemical_compound Chemical engineering chemistry visual_art Ionic liquid visual_art.visual_art_medium engineering Molecule 0210 nano-technology Polarization (electrochemistry) Hydrogen production |
| Zdroj: | RSC Advances. 8:37891-37904 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c8ra05444d |
| Popis: | The corrosion performance of carbon steel was tested in four polymeric ionic liquids (PILs) that differed only in the fatty acid linked to the chitosan (CS) amine group. The measurements were implemented involved the hydrogen evolution rate (HER), gravimetric measurements, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and quantum chemical estimations. The morphology and the elements arranged on the metal were considered by a scanning electron microscopy (SEM) system attached to an energy dispersive X-ray (EDX) system. The addition of polymeric ionic liquids hindered the rate of hydrogen generation. The order of the inhibitors efficiency was CSPTA-lauric > CSPTA-myristic > CSPTA-palmitic > CSPTA-stearic. The polarization method proved that the percentage inhibition efficiency increases with increasing the inhibitors concentration in 1 M HCl, representing a drop in the corrosion rate of carbon steel. On the other hand, the percentage inhibition decreased with the increase in temperature. Quantum chemical calculations revealed that the tested ionic liquids could react with the iron surface via electron transfer from the metal atom to ionic liquid molecule. |
| Databáze: | OpenAIRE |
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